River Quality by Elzbieta Niemirycz, Neil Mullane, Gerald A. Best, Gordon E. Grant, John C. Risley, Marshall W. Gannett, Stephen R. Hinkle, Valerie J. Kelly, Curtis L. DeGasperi, Tarang Khangaonkar, Marek J. Gromiec, Gregory J. Fuhrer, Stuart W. McKenzie, Joseph F. Rinella, Kenneth A. Skach, Tim D. Mayer, Wesley M. Jarrell, William Fish, Jacek Czerwinski, Marek Biziuk, Jacek Namiesnik, Patrick Sandra, Gregory A. Pettit, Adam Mierzwinski, Jacek Rulewski, Karin Sundblad, Andrzej Tonderski, Eugene Foster, Douglas Drake, Alan Herlihy, George Robinson, Jerzy Rybinski, Zbigniev Makowski, Elzbieta Heybowicz, Joseph L. Domagalski, Piotr Morawiec, Teresa Bogacka, Regina Taylor, Irena Kulik-Kuziemska, Romuald Ceglarski, Timothy D. Steele, Russell N. Clayshulte, Stephen G. Ellis, S. Tad Deshler, Richard Miller, Jan Zielinski, Bogdan Ozga-Zielinski, P. J. Ashton, H. R. Van Vliet, Mary Lou Soscia, Derek C. Godwin, J. Ronald Miner, Desmond Hammerton, William J. Sobolewski, Andrzej Dobrowolski, Faith E. Ruffing, Wojciech Szczepanski, Cheryl L. Martin, Philip R. Kaufmann, Lou Reynolds, Jan R. Dojlido, Judith Li, E. George Robison, William C. Romanelli, Dennis G. Woodward, Waldemar Jarosinski, Maciej Smoreda, Barbara Glowacka, Margaret A. House, Patricia A. Benner, James R. Sedell